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Sequence-Directed Covalent Protein-RNA Linkages in a Single Step Using Engineered HUH-Tags.
Adam T Smiley1, Natalia Babilonia-Díaz1, August J Krueger1
1University of Minnesota, Department of Biochemistry, Molecular Biology, and Biophysics.
Biorxiv : the Preprint Server for Biology
|August 26, 2024
Summary
Engineered HUH-tags can now form specific covalent bonds with RNA, expanding their use in biotechnology. This advancement enables precise protein-RNA bioconjugation for novel applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Replication-initiating HUH-endonucleases (Reps) are enzymes that bind single-stranded DNA (ssDNA) to initiate replication.
- These enzymes have been adapted as 'HUH-tags' for sequence-specific protein-ssDNA bioconjugation in biotechnology.
Purpose of the Study:
- To engineer HUH-tags for robust covalent bonding with RNA substrates.
- To characterize laboratory-evolved HUH-tags for protein-RNA bioconjugation applications.
Main Methods:
- Directed evolution of HUH-endonucleases.
- In vitro characterization of enzyme-substrate interactions.
- Assessing sequence-specific covalent bond formation with RNA.
Main Results:
- Engineered HUH-tags demonstrate enhanced reactivity with RNA substrates.
- Directed evolution significantly improved promiscuous Rep-RNA interactions.
- Achieved robust, sequence-directed covalent bonding between proteins and RNA.
Conclusions:
- Engineered HUH-tags provide a novel platform for site-specific protein-RNA covalent bioconjugation in vitro.
- These tools offer new possibilities for biotechnological applications involving RNA.
- The developed HUH-tags expand the utility of protein-nucleic acid bioconjugation strategies.
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